You have to contact an American Standard dealer and have them order it. They are quite expensive.

: Terry: Thanks for the site, its very informitive. My problem is color matching a seat to my Standard wall hung toilet. Its a standard F-4040-3 round front, aegean mist in color.The Bemis color chart packages they sell in stores for replacements(once opened/no return) don't tell you that they only supply the seats with 5 1/2" distance between screw sets, mine of course had to be 10". Any suggestions or help would be appreciated